Bearish for Bitcoin
Coldcard Firmware Seed Vulnerability Exploit
Quiet
Little coverage in Bitcoin in the 7 days to 21 October.
Judged on the 7-day share of Bitcoin coverage to 21 October
Updated 21 October 2026
How attention has changed
0% of Bitcoin coverage
Rolling 3-day share · as of 21 Oct 2026
This measures attention in published coverage, not the likelihood of a price move.
| Date | Share of coverage |
|---|---|
| 2026-09-22 | 0% |
| 2026-09-23 | 0% |
| 2026-09-24 | 0% |
| 2026-09-25 | 0% |
| 2026-09-26 | 0% |
| 2026-09-27 | 0% |
| 2026-09-28 | 0% |
| 2026-09-29 | 0% |
| 2026-09-30 | 0% |
| 2026-10-01 | 0% |
| 2026-10-02 | 0% |
| 2026-10-03 | 0% |
| 2026-10-04 | 0% |
| 2026-10-05 | 0% |
| 2026-10-06 | 0% |
| 2026-10-07 | 0% |
| 2026-10-08 | 0% |
| 2026-10-09 | 0% |
| 2026-10-10 | 0% |
| 2026-10-11 | 0% |
| 2026-10-12 | 0% |
| 2026-10-13 | 0% |
| 2026-10-14 | 0% |
| 2026-10-15 | 0% |
| 2026-10-16 | 0% |
| 2026-10-17 | 0% |
| 2026-10-18 | 0% |
| 2026-10-19 | 0% |
| 2026-10-20 | 0% |
| 2026-10-21 | 0% |
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The argument and its evidence
Several outlets can carry the same argument; no single article is its origin. Read each one in its own context.
All articles matched to this narrative
Recent coverage
Earlier coverage
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Decrypt · Published 3 Aug 2026
Gapped Bitcoin Wallet? Why the Coldcard Exploit Changes the Conversation About Offline Security
In coverage record: 4 Aug 2026
“In late July 2026, Bitcoin hardware wallet maker Coinkite disclosed that a firmware build error introduced in March 2021 caused some Coldcard wallets to generate seed phrases from a much smaller pool of possible values than intended. That reduced the randomness protecting users' private keys, making them vulnerable to attackers who could guess them—or use AI to guess them much more quickly than they otherwise could manually.”
Read article -
The Hacker News · Published 1 Aug 2026
Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes
In coverage record: 2 Aug 2026
“Block says an attacker who can determine or sufficiently constrain the device UID, timer state, and prior RNG-call history can reproduce candidate output streams offline without accessing the device. Candidate seeds can then be checked by deriving their addresses and comparing them with public blockchain data.”
Read article -
CoinDesk · Published 1 Aug 2026
Bitcoin cold-wallet attack spreads to 4,500 addresses as losses near $89 million
In coverage record: 2 Aug 2026
“The flaw traces to a March 2021 firmware build that routed seed generation to a predictable software randomiser instead of the chip's hardware one, leaving a bounded set of possible keys that anyone with the disclosure and enough compute can reproduce offline, without ever touching a device.”
Read article -
Crypto Breaking News · Published 1 Aug 2026
Galaxy Maps Warns Coldcard Bitcoin Losses After Wallet Incident
In coverage record: 2 Aug 2026
“Novak also said Coinkite released a hotfix intended to remove the software fallback path. However, he warned that installing the fix does not retroactively protect seeds that were generated using vulnerable firmware. In practical terms, Novak advised users who created seeds on the vulnerable firmware to move their funds to a new seed.”
Read article